Engine that includes blow-by-gas returning system

a technology of blow-by gas and engine, which is applied in the direction of machines/engines, functional valve types, combustion air/fuel air treatment, etc., can solve the problems of frozen moisture clogging the outlet of the pipe, the pipe is likely to be affected by coldness,

a technology of blow-by gas and engine, which is applied in the direction of machines/engines, functional valve types, combustion air/fuel air treatment, etc., can solve the problems of frozen moisture clogging the outlet of the pipe, the pipe is likely to be affected by coldness,

US20190345855A1Active Publication Date: 2019-11-14KUBOTA LTD
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  • Engine that includes blow-by-gas returning system
  • Engine that includes blow-by-gas returning system
  • Engine that includes blow-by-gas returning system

Examples

Experimental program
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Effect test

Embodiment Construction

[0030]Hereinafter, an engine that includes a blow-by-gas returning system according to a preferred embodiment of the present invention will be described with reference to the drawings. In the preferred embodiment, the engine is applied to an industrial diesel engine.

[0031]As illustrated in FIGS. 1 to 5, an industrial diesel engine (hereinafter simply referred to as the engine) E includes a cylinder block 1, a cylinder head 2 attached to a top of the cylinder block 1, a head cover 3 attached to a top of the cylinder head 2, and an oil pan 4 attached to a bottom of the cylinder block 1. A power transmitting case 5 is attached to a front end of the cylinder block 1. An engine cooling fan 6 is disposed in front of the power transmitting case 5. A flywheel 7 is disposed behind the cylinder block 1. An upper half of the cylinder block 1 forms cylinders 1A. A lower half of the cylinder block 1 forms a crankcase 1B.

[0032]For example, a power transmitting belt 10 and a water flange 21 are di...

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Abstract

In an engine that includes a blow-by-gas returning system configured to direct blow-by gas within a crankcase to an intake system through an inside of a head cover, the intake system includes a cover intake-passage disposed at a blow-by-gas outlet of the head cover, and the cover intake-passage communicates with a blow-by-gas passage of the blow-by-gas outlet.

Description

BACKGROUND OF THE INVENTION(1) Field of the Invention[0001]The present invention relates to an engine that includes a blow-by-gas returning system.(2) Description of Related Art[0002]An engine includes a blow-by-gas returning system not to directly release blow-by gas that stays within a crankcase to the air. The blow-by-gas returning system returns blow-by gas that stays within a crankcase to an intake system, such as an intake passage. The blow-by gas that has returned to the intake system is mixed with new fuel-air mixture and burned. It is desirable to remove as much liquid components, such as oil (oil mist) and water, contained in blow-by gas, as possible before the blow-by gas is returned to an intake passage of an engine that includes a blow-by-gas returning system.[0003]Therefore, in many conventional engines, blow-by gas is returned to an intake system through a cylinder head and a head cover from a crankcase to allow liquid components to be easily collected within the engi...

Claims

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Application Information

Patent Timeline
14 Nov 2019
Publication
US20190345855A1
IPC
F01M13/04; F02M35/10; F02M35/04
CPC
F02M35/10222; F02M35/044; F01M13/04; F02M35/10157; F01M13/00; F02M25/06; F01M2013/0455; F02M35/10091
Inventors
OSO, HIROKI; TANAKA, AKIRA